MouseMove too rare? Or a long drawing?

I noticed that MouseMove doesn't work enough often (visually), as it really is needed. I caught this situation several times in different code and it looks awful and hurts the eyes. Perhaps my perception is distorted, but it seems to me that with a large number of elements on the screen it works even less often.
P.S. Perhaps I do not understand how to handle such situations correctly and I should do something like redrawing on my own. Please tell me if this is so.
So, for example, I have a simple code in my manipulator.

It just shows the red dot exactly under the cursor. However, this is not always the case. Very often comes across something like this:

I easily reproduce this effect even in Unity examples. Pay attention to the yellow circle, the cursor is pressed in the same position. And I move the object quite a bit.

I know that this may not seem critical enough, but my eyes cannot stop seeing this, I just see how the element goes smoothly and then may not keep pace with the cursor and as a result moves unevenly.
When the elements get quite a bit more and they are a little more complicated, then I can find points in which I see such a result every second frame of my gif. In fact, they are much more, just gif is written with a rather low frequency.https://forum.unity.com/attachments...0/?temp_hash=280a6a7a850b81eb9ab9887310eb6e01
In general, this creates the feeling that there is some noticeable delay between MouseMove and drawing.

Oops...

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